moron
Truly dense person
Moron is a harsh insult for someone perceived as stupid: What kind of moron leaves their car unlocked in this neighborhood?
The word originated as a clinical term for mild intellectual disability but was abandoned by professionals decades ago.
It survives purely as an insult, stronger than *idiot* but less vulgar than profanity-based alternatives.
Foolish, senseless person
- foolUnwise, gullible person
- imbecileProfoundly stupid person
- dunceSlow-witted person
- dimwitFoolish, slow person
dolt · simpleton · blockhead · bonehead · numbskull · knucklehead · nincompoop · halfwit
Of weak intellect
- imbecileProfoundly stupid person
- idiotFoolish, senseless person
- defectiveHaving inherent faults
- subnormalBelow typical levels
retarded · simpleton · eugenics · classification · institutionalization · Goddard · IQ
Foolish, costly mistake
- gaffeClumsy social error
- bungleFail through clumsiness
- mistakeWrong action or decision
- stupidityLack of intelligence
foolishness · idiocy · incompetence · cluelessness · thoughtlessness · carelessness · recklessness · obtuseness
idiot
Foolish, senseless person
dimwit · dolt · simpleton · blockhead · bonehead · numbskull · knucklehead · nincompoop · halfwit · nitwit
feebleminded
Of weak intellect
subnormal · retarded · simpleton · eugenics · classification · institutionalization · Goddard · IQ
blunder
Foolish, costly mistake
stupidity · foolishness · idiocy · incompetence · cluelessness · thoughtlessness · carelessness · recklessness · obtuseness · denseness
dumbass
Vulgar term for fool
dickhead · asshole · jackass · dumbfuck · shitbrain · numbnuts · fuckhead · douchebag · butthead · asswipe
morongenius
Person of rare brilliance
intellectual · brainiac · mastermind · prodigy · polymath